Abstract This work presents an approach for modeling grease-lubricated bearing wear by coupling models for boundary-lubricated wear and bearing lubrication state. The lubrication model takes a mass balance approach, using previously developed models for pressure-driven side flow loss and centrifugally driven bleed supply mechanisms. These are combined with a contact model to determine the level of surface interaction and the impact that this interaction has on the lubricated wear and friction coefficients. The developed model was used in numerical simulation of the wear over time during operational conditions representative of 2 Mkm travel distance of a passenger train and the results were compared with experimental investigation of wear particles collected from field test lubricating grease. The results suggest nonlinear behavior with an increasing wear rate over time. Comparison between model results and wear volume estimated from collected wear particles is inconclusive and requires further investigation. A sensitivity analysis of the wear rate found that early in life the model is most sensitive to parameters that directly influence contact properties (load, boundary-lubricated friction coefficient, and wear coefficient). At later stages this shifts as parameters that affect the lubricant loss and supply mechanisms (temperature, base oil viscosity, lubricant fill) become equally or more important.

中文翻译：

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脂润滑调心滚子轴承磨损的建模

摘要 这项工作提出了一种通过边界润滑磨损和轴承润滑状态的耦合模型来模拟脂润滑轴承磨损的方法。润滑模型采用质量平衡方法，使用先前开发的压力驱动侧流损失模型和离心驱动排气供应机制。这些与接触模型相结合，以确定表面相互作用的水平以及这种相互作用对润滑磨损和摩擦系数的影响。开发的模型用于在代表客运列车 2 Mkm 行驶距离的运行条件下随时间推移的磨损的数值模拟，并将结果与​​从现场测试润滑脂收集的磨损颗粒的实验研究进行比较。结果表明随着时间的推移磨损率增加的非线性行为。模型结果与根据收集的磨损颗粒估计的磨损量之间的比较尚无定论，需要进一步调查。磨损率的敏感性分析发现，模型在早期对直接影响接触特性的参数（载荷、边界润滑摩擦系数和磨损系数）最为敏感。在后期，随着影响润滑剂损失和供应机制（温度、基础油粘度、润滑剂填充）的参数变得同等或更重要，这种情况会发生变化。磨损率的敏感性分析发现，模型在早期对直接影响接触特性的参数（载荷、边界润滑摩擦系数和磨损系数）最为敏感。在后期，随着影响润滑剂损失和供应机制（温度、基础油粘度、润滑剂填充）的参数变得同等或更重要，这种情况会发生变化。磨损率的敏感性分析发现，模型在早期对直接影响接触特性的参数（载荷、边界润滑摩擦系数和磨损系数）最为敏感。在后期，随着影响润滑剂损失和供应机制（温度、基础油粘度、润滑剂填充）的参数变得同等或更重要，这种情况会发生变化。